Once you have the BZ-X:

A built-in Z-stack function captures multiple images at different focal positions and is able to create a fully-focused image by combining only the areas that are at their sharpest focus.

After capturing the focus data at each height, high resolution 3D images can be created by incorporating the Z-pitch that was used. Not only does this help to give a better understanding of the structure of the plant cells, but also of the localization.